<template>
  <div class="app-layout-top">
    <div class="app-layout-top__top"></div>
    <div class="app-layout-top__body">
      <slot />
    </div>
  </div>
</template>

<style>
.app-layout-top {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.app-layout-top__top {
  height: 64px;
  background-color: aliceblue;
}

.app-layout-top__body {
  flex: 1;
  background-color: green;
}
</style>
